878941651 has 4 divisors (see below), whose sum is σ = 1004504752. Its totient is φ = 753378552.

The previous prime is 878941643. The next prime is 878941663. The reversal of 878941651 is 156149878.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 878941651 - 2³ = 878941643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 878941595 and 878941604.

It is not an unprimeable number, because it can be changed into a prime (878941621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62781540 + ... + 62781553.

It is an arithmetic number, because the mean of its divisors is an integer number (251126188).

Almost surely, 2^878941651 is an apocalyptic number.

878941651 is a deficient number, since it is larger than the sum of its proper divisors (125563101).

878941651 is a wasteful number, since it uses less digits than its factorization.

878941651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125563100.

The product of its digits is 483840, while the sum is 49.

The square root of 878941651 is about 29646.9501129543. The cubic root of 878941651 is about 957.8996510577.

The spelling of 878941651 in words is "eight hundred seventy-eight million, nine hundred forty-one thousand, six hundred fifty-one".